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Engine coolingPart report

2007 Mercedes-Benz ML320 Engine cooling Problems

Complaints
5about this part
Share
31%of 16 total for the year
Median mileage
36,000miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 5 complaints about the engine cooling of the 2007 Mercedes-Benz ML320, 31% of the 16 complaints for this model year. Where a mileage was given, the median is 36,000 miles. 1 a fire, according to the filers.

Fewer than 15 complaints name this part, so treat the figures as a rough indication only.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“I purchased a used 2007 mercedes ML320 cdi on march 12. After a week of driving - I inspected the engine compartment (I usually do). I noticed engine oil dripping (small but noticeable amount) on the serpentine belt. I did not think it was urgent - so I took pictures so I can send it to my seller to claim warranty. On march 23, I was driving with my family on I-65. Suddenly, steering became very hard. It was a curving highway so I was forced to go into other lanes. Lucky, traffic was not heavy so I did not swerve into any other vehicle. …”

NHTSA complaint #10393093, filed 2011-03, 36,000 miles

“Dear NHTSA, my '07 mercedes ml-320-cd was bought 'new'. The defect of a run-away, hi RPM revving-up of this diesel engine was first experienced approx 21/2 months ago. It happened shortly after having it parked at a local shopping ctr from which I drove it onto the main street ata moderate speed of less than 20 MPH. Suddenly the engine revved up to maybe 5 or 6 000 RPM causing this SUV accelerate beyond control. I had to use both of my feet on the brake pedal before pulling over onto the curb where I turned off the ignition . …”

NHTSA complaint #10280925, filed 2009-08, 16,000 miles

“The contact owns a 2007 mercedes benz ML320. The contact was driving 55 MPH when the check engine warning light illuminated on the instrument panel. The vehicle was taken to the dealer for diagnosis where the dealer stated that the emission control needed to be replaced. The vehicle was repaired. The manufacturer was contacted and advised that there was no defect found within the vehicle. The failure and current mileage was 82,000.”

NHTSA complaint #10457017, filed 2012-05, 82,000 miles

“The contact owns a 2007 mercedes benz ML320. While driving 60 MPH, all of the interior and instrument panel lights illuminated and then the engine stopped. The steering diminished and it became very difficult to maneuver the vehicle. The contact pulled off the road and the vehicle was towed to the dealer. The dealer stated that the crank shaft sensor failed and they replaced the component. The contact spoke with mercedes, but they were of no assistance. The current and failure mileages were 5,400. The consumer also added braking was diminished as well. Updated”

NHTSA complaint #10206790, filed 2007-10, 5,400 miles

Related service bulletins

Engine cooling: other model years

YearComplaintsShare of year
2009414%
2008210%
2007531%
200256%
200132%
20002716%
19993528%
19983123%

Other parts of the 2007 Mercedes-Benz ML320

Brakes
3 complaintsSeats
3 complaintsElectrical system
2 complaintsFuel system
2 complaintsTransmission and drivetrain
2 complaintsAir bags
1 complaintsSteering
1 complaints

← All problems reported for the 2007 Mercedes-Benz ML320

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 30, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology